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x86: page.h: make pte_t a union to always include

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Make sure pte_t, whatever its definition, has a pte element with type
pteval_t.  This allows common code to access it without needing to be
specifically parameterised on what pagetable mode we're compiling for.
For 32-bit, this means that pte_t becomes a union with "pte" and "{
pte_low, pte_high }" (PAE) or just "pte_low" (non-PAE).

Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Jeremy Fitzhardinge
2008-01-30 13:32:57 +01:00
committed by Ingo Molnar
parent b7fff536d0
commit c8e5393ab3
10 changed files with 29 additions and 41 deletions
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6
include/asm-x86/pgtable_64.h
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@@ -72,7 +72,7 @@ extern unsigned long empty_zero_page[PAGE_SIZE/sizeof(unsigned long)];
static inline void set_pte(pte_t *dst, pte_t val)
{
pte_val(*dst) = pte_val(val);
*dst = val;
}
#define set_pte_at(mm,addr,ptep,pteval) set_pte(ptep,pteval)
@@ -222,7 +222,7 @@ static inline void ptep_set_wrprotect(struct mm_struct *mm, unsigned long addr,
#define pmd_pfn(x) ((pmd_val(x) & __PHYSICAL_MASK) >> PAGE_SHIFT)
#define pte_to_pgoff(pte) ((pte_val(pte) & PHYSICAL_PAGE_MASK) >> PAGE_SHIFT)
#define pgoff_to_pte(off) ((pte_t) { ((off) << PAGE_SHIFT) | _PAGE_FILE })
#define pgoff_to_pte(off) ((pte_t) { .pte = ((off) << PAGE_SHIFT) | _PAGE_FILE })
#define PTE_FILE_MAX_BITS __PHYSICAL_MASK_SHIFT
/* PTE - Level 1 access. */
@@ -264,7 +264,7 @@ static inline void ptep_set_wrprotect(struct mm_struct *mm, unsigned long addr,
#define __swp_offset(x) ((x).val >> 8)
#define __swp_entry(type, offset) ((swp_entry_t) { ((type) << 1) | ((offset) << 8) })
#define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) })
#define __swp_entry_to_pte(x) ((pte_t) { (x).val })
#define __swp_entry_to_pte(x) ((pte_t) { .pte = (x).val })
extern spinlock_t pgd_lock;
extern struct list_head pgd_list;